Considering this user made an account on lemmy.ml to post this, and the community in world was made by the same user with a world account, maybe they don’t understand the federation aspect correctly. It seems to happen a lot, and it’s frustrating because it leads to one huge instance in lemmy.world.
A good documentary, on the USSR though not modern Russia, is The Human Face of Russia. You can find it on YouTube. It’s Australian as well so it’s interesting seeing a look into the Soviet Union from the point of view of a country that is aligned with the US but without so much Red Scare propaganda.